i assume its male?

try play wit it until it gets tired.

when its older, maybe will be more quiet.

u put him in cage or seperate frm you for long time during work? n sleep @ nite?

For male cats even after a couple of days after neutered (can up to few weeks) they can still have instinct to mount female cat that is in heat. They even can make female cat pregnant during this period. It takes few weeks for all of the sex hormones in circulation to be eradicated. One of my male cats like this but he is not vocal though. After a week if I remember correctly, eventually he have zero feeling to female cat. I think your cat will calm down eventually.

this is the first time in my life heard someone chain their cat. around his neck?

y ur cat so nice can be chained like a dog?
pedigree cat?

i tried to put a kg cat on leash, end up he is trying to kill himself by strangling, and do whatever possible stunt to escape.. lol..

u sure he is making noise cos wana go out find female cat?

age just above 6mnths - 9?

if your cat is ok with it. it doesnt struggle or trying to harm himself with the leash, and there is people @ home looking after him,, should be ok.

but dont leave him unattended like that.

some cats are cool.
like the white cat tht clings on to the back of the mat motor balik kampung.. even on the highway, so far he never jumps off. but its very stress to see he has to do that.

if your cat, is making noise because he dont like to be leashed like that, then u need to think of other way.
if you dont wana let him out of the hse (better dont)
you find a time when he can be released inside the hse, with the door close. there r times when its not possible, so put him in a room or a cage.